How do parasites evade the host immune system?

What causes it? Neutropenia is often caused by cancer treatments such as chemotherapy and radiation. These treatments destroy cancer cells. But they can ... White-nose syndrome (WNS) has caused recent catastrophic declines among multiple species of bats in eastern North America. The disease's name derives from a ... Apr 8, 2025 ... Causes · Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis. The germs can cause infection when that person—who now has germs on their hands—touches their eyes, nose or mouth. Some germs can stay on countertops or ... Diagnosing respiratory infections · Sputum test: You may be asked to provide a sample of mucus to be checked for bacteria. · Tuberculin skin test: A small ... Most sinus infections are caused by viruses. The viruses can be spread through sneezes and coughs. Bacterial and fungal sinusitis may be contagious as well. Sep 20, 2022 ... Common bacterial diseases include UTIs, food poisoning, STIs and some skin, sinus and ear infections. They're often treated with antibiotics. Sep 11, 2024 ... The most common eye infection from contact lenses. Keratitis is the most common eye infection from wearing contact lenses. It is when the cornea ... Causes. The cause of an infection is whichever type of organism has entered the body. A specific virus, for example, will be the cause of a viral infection. The ... Multiple variables, from climate variations to the presence of wildlife carriers, cause rates of infections to vary dramatically from year to year—even within ...